Google Inc.’s life sciences group has created a health-tracking wristband that could be used in clinical trials and drug tests, giving researchers or physicians minute-by-minute data on how patients are faring.

The experimental device, developed within the company’s Google X research division, can measure pulse, heart rhythm and skin temperature, and also environmental information like light exposure and noise levels. It won’t be marketed as a consumer device, said Andy Conrad, head of the life sciences team at Google.